Jet pump and the like



y 1934- J. STEPHENS 1,958,354

JET PUMP AND THE LIKE Filed April 8, 1932 l atenteci May 8 1934 UNITED STATES JET PUMP AND THE LIKE Joseph Stephens, Dunedin, New Zealand Application April 8, 1932, Serial No. 603,999% In New Zealand April 9, 1931 6 Claims.

An object of the invention is to provide means for lifting water from a lower level to a high level, by using the flow of a running stream or" water. A stream of water passing through a metal tube (preferably) in which is suitably disposed a wedge shaped fitting, and by which means the stream of water is divided into two distinct streams, which unites again as soon as they pass the wedge shaped fitting. This operation causes a vacuum to be formed at a certain point in the flow of the stream of water. Immediately under this wedge shaped fitting, and coinciding with the point where the vacuum has been formed, a suction pipe is fitted, having its lower end immersed in the liquid or substance, which is desired to raise.

Air may be drawn through the suction pipe into the metal tube. The air would thus mix with the water in the tube and by suitable means he collected and used. A vacuum is thus formed and maintained as long as water flows through the metal tube, and water, air, or heavier substances may be raised from one level to another without attention or cost.

A further object is to provide an attachment for hydraulic sluicing elevators, whereby the usual narrow hard metal throat casting is dispensed with and the efficiency of a hydraulic elevator is greatly increased.

Another feature of the invention is that by its use an entirely new field is opened up in hydraulics because the jet pump as described above, requires only low falls to operate it, say from twelve inches in height, whereas the present custom is to work hydraulic installations with high pressures.

With the foregoing and other equally important advantages in View, the invention resides in the certain new and useful combinations, constructions and arrangements of parts as will be hereinafter more fully described, set forth in the appended claims, and illustrated in the accompanying drawing in which;

Fig. 1 is a vertical sectional view of one form of my jet pump.

Fig. 2 is a similar horizontal sectional view of Fig. 1.

Fig. 3 is a perspective View of the dividing wedge which forms the vacuum in the metal tube.

Fig. 1 is a fragmentary horizontal sectional view of Fig. 3, in position in the metal tube, showing formation of vacuum.

Fig. 5 is an end view, partly sectional, showing one form of the jet pump arranged to pump out a flooded field.

Fig. 6 shows one form of arrangement of the jet pump when cooling a room (partly sectional).

Fig. 7 shows fragmentary view of an application of the jet pump in hydraulic elevating.

Fig. 8 is a perspective view of an adjustable form of dividing wedge.

9 is a horizontal sectional view taken through the wedge shown in Fig. 8.

Referring to the drawing wherein similar characters of reference designate corresponding parts throughout the several views thereof, and more particularly to Figs. 1 and 2 of the same, the embodiment of the invention, as shown therein by way of example, comprises a conduit restricted intermediate its ends and which is made up of a tapered inlet pipe 10, to which is attached at its small end, the small end of a tapered outlet pipe 11, with a suction pipe 12, fitted near the junction of the pipes 10 and 11 as best shown in Figure 1.

Positioned securely within 10 is a wedge shaped tting 13, which projects into the outlet pipe 11, and has its narrow end adjacent to the wide end of inlet pipe 16. Extension wings 14 and 14a adjustable lengthwise, and of convex or concave section or otherwise, are fitted to the wide end of 13, wings 14 and 14a thus positioned on 13 leave a space between them 15. When water under pressure is allowed to pass through the combination of parts forming the jet pump, it comes in contact with the thin end of 13, near the entrance end of 10, and opens out into two streams, shown by arrows. As soon as these streams pass the wings 14 and 14a, they join up again leaving a vacuum in 15. A short space exists between the end of wings l4 and 14a, and the point where the streams meet. This portion is a vacuum 16 and is an extension of that in 15, as reference in Fig. 4 will show.

The vacuum 15, 16, thus formed is immediately over the suction pipe 12 opening. The moving water in the jet pump maintains this vacuum 15, 16, ensuring a continuous delivery, the water flowing through mixing with the contents of 12 in the direction of arrow in 11.

Referring again to Figs. 1 and 2, 17 represents an overflow pipe from the top of a dam. Overfiow water from the dam can be used to give more velocity to the water being delivered out of 11.

Referring more particularly to Figure 3, it will be noted that the wedge shaped fitting 13 which is positioned in the inlet pipe 10, includes extension wings 14 and 14a. These wings may be flat or otherwise shaped according to the duties required thereof, and the fitting 13 in some cases, may be made up of separable parts, hinged together at the apex 18 for adjustment toward and away from each other, with means to hold them in adjusted positions, so that the wings may be adjusted with respect to each other, out or in to vary the space between the same, for varying velocities and quantities.

The illustrations in Figs. 8 and 9 of the drawing disclose the hingedly adjustable form of wedge alluded to in the foregoing in order that velocities and quantities may be varied. Porindicated in 25.

tions of the wedge are disposed for overlapping relation in order that the full benefit of the suction will be directed at the point of communication of the rounded portion of the wedge and the suction pipe.

The mode of formation of a vacuum in a jet pump is seen by a reference to Fig. 4. The arrows show the direction of the stream of water after forming a vacuum at 15 and 16 which vacuum is immediately filled with liquid, drawn through 12 when jet pump is working. The method of using the jet pump to drain flooded lands when the outlet channel is flowing higher than the flood water in the paddock, is understood by reference to Fig. 5.

A complete jet pump as shown, for example Figs. 1 and 2 is laid in a running stream 21, the suction pipe 12 is taken through a protecting bank 19, sealed from leakage, and the end 12a laid in the flood water. A non-return valve 20, is fitted on the end of the suction pipe 12. As the flowing water passes through the jet pump, water is drawn through the suction pipe 12 and discharged into the fiowing river 21, as before 1 explained.

pump and collected in 23 will find its way back into 22 through pipe 24. Air will be cooled and pure.

In gold mining and kindred industries, low powered falls can be harnessed and used to profit. The principle is illustrated in Fig. '7 where the jet pump portion of the hydraulic sluicing elevator is shown. 1% is an extension of the inlet pipe 10, Figs. 1 and 2, while the suction pipe 12 and wedge shaped fitting 13 are positioned as before. In this arrangement, eificiency is not dependent on high water falls, and great velocity, but on a lower fall in combination with the wedge shaped fitting positioned to use vacuum as means for raising liquid or material as A delivery pipe extension is shown at 11b.

It is understood that there may be one or more suction pipes in any form of jet pump. Without further description it is thought that the features and advantages of the invention will be apparent to those skilled in the art, and it will be understood that changes in the form, proportion, and minor details of construction, may be resorted to without departing from the spirit of the invention or its scope as claimed.

I am aware that liquid injectors are in use all over the world; I do not claim these, but the application to jet pumps for the first time, of a law of nature made use of in the manner described.

Having thus described my invention, I claim:-

1. The combination with an inlet pipe, an outlet pipe, and a suction pipe connected together, a wedge shaped fitting positioned within the inlet pipe, and extending to the junction of the suction pipe with the other pipes, and means whereby the wedge shaped fitting can be made to expand or contract at its wide end.

2. A pump comprising a conduit havingv a restricted portion formed intermediate its ends and within the bore thereof, a suction pipe in communication with the conduit adjacent to the restricted portion thereof, means arranged in the conduit in a manner to provide passages upon the opposite sides thereof and having an elongated sharpened edge at one end directed toward the intake end of the conduit, said means having sides inclined outwardly from its sharp edge to provide a large end opposed to said edge, spaced wings on the large end and arranged whereby the space between the wings is aligned with the point of communication of the suction pipe with the conduit.

3. A pump comprising a conduit having a restricted portion formed at an appropriate point in its length and within the bore thereof, a suction pipe in communication with said conduit, a wedge shaped fitting arranged longitudinally in said conduit in a manner to provide passages upon opposite sides thereof, wings extending from the large end of the wedge shaped fitting, and said wedge shaped fitting being disposed so that the space between the wings will be substantially aligned with the point of communication of the suction pipe with the conduit.

4. A pump comprising a conduit having a restricted portion formed at an appropriate point in its length and within the bore thereof, a suction pipe extending from and in communication with said conduit, a substantially wedge shaped fitting arranged longitudinally in said conduit to provide passages upon the opposite sides thereof and including separable parts, a wing for each part and extending from the large end of said fitting, said wings being disposed in spaced relation with respect to each other and arranged whereby the space between the same is aligned with the point of communication of the suction pipe with the conduit, and said parts being hingedly connected whereby the wings can be adjusted with respect to each other to vary the space between the same.

5. A pump comprising a conduit including a tapered inlet pipe and a tapered outlet pipe connected together at their small ends to provide a restricted portion in said conduit, a suction pipe in communication with the outlet pipe adjacent to the restricted portion, a substantially wedge shaped fitting arranged in the conduit in a manner to provide passages upon the opposite sides thereof and having its sharp end directed toward the inlet end of the inlet pipe, spaced wings formed on the large end of the wedge shaped fitting, and said wings being disposed so that the space between the same is aligned with the point of connection of the suction pipe with the conduit.

6. A pump comprising a conduit having a restricted portion formed at an appropriate point in its length and within the bore thereof, a suction pipe in communication with the conduit, a substantially wedge shaped fitting arranged longitudinally in said conduit and in a manner to provide passages upon opposite sides thereof, said wedge shaped fitting having its sharp end directed toward the inlet end of the conduit, the opposite end of the fitting being rounded, wings extending from the opposite sides of the rounded end, and said wings being arranged whereby the space between the same is aligned with the point of communication of the suction pipe with the conduit.

JOSEPH STEPHENS. 

